本文对兰州市3月—17周岁的儿童及青少年1320人，男660人，女660人进行了骨龄研究。
This paper studied the skeletal age of 1320 infants and adolescents of 3 months to 17 years (including 660 males, 660 females) in Lanzhou City.
方法 研究临床接受骨皮质切开术辅助治疗的正畸患者48例，男14例，女34例。
Methods 48 orthodontic patients were selected, 14 males and 34 females, and they all accepted corticotomy assisted orthodontic treatment.
方法 研究临床接受骨皮质切开术辅助治疗的正畸患者48例，男14例，女34例。
Methods 48 orthodontic patients were selected, 14 males and 34 females, and they all accepted corticotomy assisted orthodontic treatment.
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